Abstract: Disclosed is a printing plane adjusting mechanism for a typewriter or similar machine wherein a paper handling system including a platen defining the printing plane is finely as well as coarsely adjustable by a single lever relative to a printing element to establish a predetermined normal distance between the printing plane and printing element or varied distances other than normal to accommodate paper packs of varying thickness. Adjustment of the normal distance or gap is effected without loosening or tightening screws.

Abstract: Side frames supporting mechanisms of a machine are provided with lugs for plug-in insertion into slots in a base housing for the machine which form the sole connection to the side frames. The base housing slots and the lugs on the side frames are so located as to provide side to side and front to back rigidity. Resilient material between the lugs and slots serve to frictionally clamp and secure the connections. The base housing includes detent structure to removably secure a cover housing to the base housing.

Abstract: A crankshaft assembly for precision low load applications has cylindrical crankpins mounted on concave peripheral grooves on the ends of a crankshaft and coupled thereto by clamps which lockingly engage aligned annular grooves in the crankshaft and crankpin.

Abstract: A device to facilitate the changing of disc-shaped type carriers in typewriters or printers includes a lever operated device to push against the type disc and to press it off its shaft. A basket is provided to catch the type wheel after its disengagement from the shaft to prevent it from falling into the interior of the machine.

Abstract: A paper feed apparatus for a business machine having endless forms feeding mechanism and sheet feeding mechanism incorporates lever means operable to disable the sheet feeding mechanism through movement of the sheet feed friction roll shaft about one of its ends thereby to separate the feed roll from engagement with a platen.

Abstract: A paper handling assembly supporting a platen, a paper bail adjustably mounted for movement relative to said platen and a paper guide trough adjustably mounted for movement relative to said platen. The assembly includes a common shaft which mounts a first paper pack thickness adjusting lever operative to rotate said shaft to effect movement of the entire paper handling assembly relative to a frame to adjust the printing gap, rotatably supports a second paper bail adjusting lever operative to adjustably move said paper bail, and rotatably supports a third paper trough adjusting lever operative to adjustably move said paper trough.

Abstract: Disclosed is a preferably transparent removably mounted cover plate for covering the top opening or printing point area in a printer, e.g. a needle printer, which serves to reduce noise and to prevent the introduction of foreign substances and dust. Of particular advantage is the inclusion on the cover plate of paper guide elements, a switch actuating cam which acts on a switch to shut off the machine when the cover plate is removed or swung out, and a paper tear-off edge.

Abstract: A daisy wheel print element provided with hammer energy absorbing formations to obtain substantially uniform print density for different print area types.

Abstract: An Arabic language or other right to left writing typewriter having mechanism normally effecting letter feeding movement from right to left in response to type actions is provided with additional mechanism selectively operatively positionable to effect power operated left to right letter feeding movement in response to type actions.

Abstract: A wire matrix print head is configured for detachable mounting in a complementary shaped support and held thereto by a spring device which urges the complementary surfaces of the head and its support in secure contact with one another.

Abstract: A single piece paper guide device incorporating an aligning scale which is movably hinged to allow movement from a working position to a service position.

Abstract: A typewriter having a carriage return line indexing key to initiate in parallel a powered carriage return and a powered line indexing operation is provided with linkage associated with the carriage return action which assures initiation of the line indexing operation should the keylever depression be sufficient to initiate a carriage return operation but insufficient to initiate the line index operation.

Abstract: Cartridges housing ribbon spools with a length of ribbon extending externally of the cartridge between exit and inlet openings in the cartridge are provided with an integral anti spool rotation device to prevent spool rotation as would allow inadvertent or accidental withdrawal of an undue length of ribbon externally of the cartridge. Incident to mounting the cartridge on a machine, the locking device is moved to a spool release position without detachment or separation from the cartridge for later movement to anti rotation position if removal of an unspent cartridge is required.

Abstract: A wire matrix print head having print wires subject to wear at their printing ends are biased by return springs against one side of one end of armatures, the other sides of which bear against a gap adjusting ring. The other end of each of the armatures is spaced by a predetermined gap from the pole piece of associated electromagnets which, when energized, drive the armatures about pivots intermediate the ends of the armature against the bias of the return springs. The ends of the armatures are formed with a step on the side initially placed in contact with the drive end of a print wire so that when the print wires are worn the armatures can be flipped over to present the unstepped side in contact with a drive wire with the result that upon movement of the adjusting ring to restore the gap between the armature and pole piece the print wires are pushed to a rest position closer to the printing plane by the depth of the step.

Abstract: A flexible shaft coupling for connecting a drive and a driven shaft comprises an axially stacked plurality of flexible metal discs which are connected to one another at oppositely spaced peripheral points with the directly connection between one disc and its neighboring disc on one side being displaced 90.degree. from the interconnection with the neighboring disc on its other side. The coupling is particularly suited to transmit torque yet allow movement of the driven shaft axis relative to the drive shaft axis. The invention has particular application to small precision mechanisms such as a single element typewriter wherein the single element typehead, secured to the driven shaft, must be capable of being rotated and tilted to position a desired character opposite a printing point.

Abstract: An electromechanical printer having characters of a type font located on radial spokes of a circular type disc is disclosed. The type disc is normally arrested and connected to be driven about its axis by a unidirectional motor source via a slip clutch. Selection-print activating mechanism responsive to source, e.g. keyboard, generated mechanical outputs serve to select a character stop, in an assembly of character stops, corresponding to characters located on the spokes of the type disc and, incident to selection of a character stop, to release the normally arrested type disc. The type disc is provided with counterstops adapted to engage selected character stops positioned in the path thereof and to move the character stop assembly to a frame supported final positioning stop which arrests the type disc with the selected character opposite a print point.

Abstract: A carriage supporting a single type element is couplable either to the upper run or the lower run of a looped cable drive system for left or right or right to left letter feeding movement under control of an escapement pawl carrier associated with a unidirectional control rack and driven by the upper run of the cable drive system.

Abstract: Printing members comprising a mosaic printing head are driven by flexural bending elements which are electrically actuated to produce a desired printed pattern. The bending elements may take the form of piezoelectric strips or diaphragm pieces which are supported by bearings located at nodal oscillation points of the elements. The printing members when actuated protrude from a bore in one end of a printing head housing. The printing head housing is mounted for transverse movement along guide rails.

Abstract: A device for enabling a golfer to determine the proper length of putting stroke according to the distance between ball and hole and according to the lie of the ball. The device comprises a plurality of scales representing relationships between putting strokes and putt distances for various lies. According to visual estimates of the distance and lie of a ball, be it flat, uphill, downhill or sidehill, a golfer may read out from the scales the corresponding putt stroke and aim necessary to hole a putt of any distance and lie.